The Boeing X-48C research aircraft flew for the 30th and final time April 9, 2013, marking the successful completion of an eight-month-long flight-test program to explore and further validate the aerodynamic characteristics of the Blended Wing Body design concept. All 30 flights were conducted at NASA’s Dryden flight Research Center in California. The X-48C typically flew for approximately 30 minutes on most flights, reaching speeds of up to 140 miles per hour (225 kilometers per hour) and attaining altitudes of about 10,000 feet (3,050 meters). X-48C flight testing began Aug. 7, 2012.